When Soapstone is fresh from the quarry it is light gray color; that rich charcoal color soapstone is when the stone is exposed to water, grease and oils. These liquids cause the stone to oxidize, which darkens the stone’s color and really brings out its natural beauty. To help expedite oxidation of the stone, we recommend that you treat it with mineral oil from time to time. This treatment will keep oxidation uniform across the entire surface.You can clean your soapstone after using mineral oil by using any household cleaners such as Ajax or Comet. Usually just wiping the soapstone with soap and water works just fine. A soapstone sink will stand up to any mild cleaner. Sink corners can be easily kept clean with the use of a small vegetable brush when needed.